As Lily and Marshall host their first Thanksgiving as a married couple, Barney is tortured by the tick-tock of the slap bet countdown clock and the uncertainty of the exact moment the slap is going to be delivered.
Wilhelmina realizes that her maid of honor (Victoria Beckham) is stealing her thunder as she prepares for her big day; guilt consumes Betty over her pact with Wilhelmina.
Henry reluctantly agrees to go on a double date with Betty and an unlikely couple - Hilda and Gio. Meanwhile, Wilhelmina's attempt to change her image as the queen of mean fails miserably after she tangles with America's most beloved golden girl.
